/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 17:19:28,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 17:19:28,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 17:19:28,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 17:19:28,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 17:19:28,610 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 17:19:28,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 17:19:28,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 17:19:28,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 17:19:28,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 17:19:28,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 17:19:28,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 17:19:28,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 17:19:28,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 17:19:28,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 17:19:28,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 17:19:28,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 17:19:28,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 17:19:28,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 17:19:28,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 17:19:28,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 17:19:28,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 17:19:28,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 17:19:28,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 17:19:28,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 17:19:28,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 17:19:28,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 17:19:28,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 17:19:28,657 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 17:19:28,674 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 17:19:28,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 17:19:28,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 17:19:28,677 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 17:19:28,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 17:19:28,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 17:19:28,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 17:19:28,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 17:19:28,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 17:19:28,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 17:19:28,679 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 17:19:28,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 17:19:28,680 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 17:19:28,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 17:19:28,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 17:19:28,681 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 17:19:28,681 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 17:19:28,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 17:19:28,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:19:28,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 17:19:28,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 17:19:28,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 17:19:28,682 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-07-17 17:19:28,980 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 17:19:28,994 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 17:19:28,999 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 17:19:29,000 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 17:19:29,001 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 17:19:29,001 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c [2020-07-17 17:19:29,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44007e1c4/7b6e773e50124a23b1f3500863286d17/FLAG6d72c422b [2020-07-17 17:19:29,515 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 17:19:29,516 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c [2020-07-17 17:19:29,524 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44007e1c4/7b6e773e50124a23b1f3500863286d17/FLAG6d72c422b [2020-07-17 17:19:29,906 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44007e1c4/7b6e773e50124a23b1f3500863286d17 [2020-07-17 17:19:29,916 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 17:19:29,919 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 17:19:29,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 17:19:29,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 17:19:29,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 17:19:29,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:19:29" (1/1) ... [2020-07-17 17:19:29,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c71e754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:19:29, skipping insertion in model container [2020-07-17 17:19:29,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:19:29" (1/1) ... [2020-07-17 17:19:29,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 17:19:29,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 17:19:30,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:19:30,140 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 17:19:30,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:19:30,173 INFO L208 MainTranslator]: Completed translation [2020-07-17 17:19:30,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:19:30 WrapperNode [2020-07-17 17:19:30,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 17:19:30,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 17:19:30,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 17:19:30,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 17:19:30,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:19:30" (1/1) ... [2020-07-17 17:19:30,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:19:30" (1/1) ... [2020-07-17 17:19:30,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:19:30" (1/1) ... [2020-07-17 17:19:30,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:19:30" (1/1) ... [2020-07-17 17:19:30,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:19:30" (1/1) ... [2020-07-17 17:19:30,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:19:30" (1/1) ... [2020-07-17 17:19:30,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:19:30" (1/1) ... [2020-07-17 17:19:30,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 17:19:30,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 17:19:30,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 17:19:30,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 17:19:30,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:19:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:19:30,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 17:19:30,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 17:19:30,363 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-17 17:19:30,363 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-17 17:19:30,363 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 17:19:30,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 17:19:30,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 17:19:30,363 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-17 17:19:30,363 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-17 17:19:30,363 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 17:19:30,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 17:19:30,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 17:19:30,599 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 17:19:30,600 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 17:19:30,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:19:30 BoogieIcfgContainer [2020-07-17 17:19:30,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 17:19:30,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 17:19:30,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 17:19:30,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 17:19:30,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:19:29" (1/3) ... [2020-07-17 17:19:30,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71906f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:19:30, skipping insertion in model container [2020-07-17 17:19:30,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:19:30" (2/3) ... [2020-07-17 17:19:30,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71906f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:19:30, skipping insertion in model container [2020-07-17 17:19:30,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:19:30" (3/3) ... [2020-07-17 17:19:30,614 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.c [2020-07-17 17:19:30,627 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 17:19:30,639 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 17:19:30,659 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 17:19:30,690 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 17:19:30,690 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 17:19:30,691 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 17:19:30,691 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 17:19:30,691 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 17:19:30,692 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 17:19:30,692 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 17:19:30,692 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 17:19:30,733 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-07-17 17:19:30,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-17 17:19:30,769 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:30,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:30,775 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:30,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:30,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-07-17 17:19:30,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:30,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121633853] [2020-07-17 17:19:30,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:30,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:19:31,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121633853] [2020-07-17 17:19:31,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:19:31,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 17:19:31,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847094360] [2020-07-17 17:19:31,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:19:31,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:31,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:19:31,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:19:31,031 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-07-17 17:19:31,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:31,173 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-07-17 17:19:31,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 17:19:31,176 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-17 17:19:31,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:31,189 INFO L225 Difference]: With dead ends: 58 [2020-07-17 17:19:31,189 INFO L226 Difference]: Without dead ends: 42 [2020-07-17 17:19:31,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:19:31,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-17 17:19:31,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-17 17:19:31,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-17 17:19:31,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-07-17 17:19:31,258 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-07-17 17:19:31,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:31,259 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-07-17 17:19:31,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:19:31,259 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-17 17:19:31,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-17 17:19:31,262 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:31,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:31,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 17:19:31,263 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:31,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:31,264 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-07-17 17:19:31,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:31,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808674585] [2020-07-17 17:19:31,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:19:31,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808674585] [2020-07-17 17:19:31,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:19:31,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 17:19:31,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959443487] [2020-07-17 17:19:31,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:19:31,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:31,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:19:31,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:19:31,337 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-07-17 17:19:31,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:31,412 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-07-17 17:19:31,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 17:19:31,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-17 17:19:31,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:31,415 INFO L225 Difference]: With dead ends: 50 [2020-07-17 17:19:31,415 INFO L226 Difference]: Without dead ends: 44 [2020-07-17 17:19:31,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:19:31,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-17 17:19:31,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-07-17 17:19:31,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-17 17:19:31,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-07-17 17:19:31,432 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-07-17 17:19:31,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:31,432 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-07-17 17:19:31,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:19:31,433 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-07-17 17:19:31,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-17 17:19:31,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:31,435 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:31,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 17:19:31,436 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:31,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:31,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-07-17 17:19:31,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:31,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896749562] [2020-07-17 17:19:31,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 17:19:31,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896749562] [2020-07-17 17:19:31,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:31,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:19:31,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367941962] [2020-07-17 17:19:31,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:19:31,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:31,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:19:31,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:19:31,586 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 7 states. [2020-07-17 17:19:31,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:31,730 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2020-07-17 17:19:31,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 17:19:31,731 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-07-17 17:19:31,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:31,733 INFO L225 Difference]: With dead ends: 82 [2020-07-17 17:19:31,733 INFO L226 Difference]: Without dead ends: 46 [2020-07-17 17:19:31,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:19:31,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-17 17:19:31,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-07-17 17:19:31,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-17 17:19:31,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-07-17 17:19:31,754 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 33 [2020-07-17 17:19:31,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:31,754 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-07-17 17:19:31,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:19:31,755 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-07-17 17:19:31,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-17 17:19:31,757 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:31,757 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:31,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 17:19:31,758 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:31,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:31,759 INFO L82 PathProgramCache]: Analyzing trace with hash 887160861, now seen corresponding path program 1 times [2020-07-17 17:19:31,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:31,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352917152] [2020-07-17 17:19:31,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:31,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 17:19:31,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352917152] [2020-07-17 17:19:31,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:31,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:19:31,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78189051] [2020-07-17 17:19:31,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:19:31,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:31,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:19:31,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:19:31,888 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 7 states. [2020-07-17 17:19:32,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:32,104 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2020-07-17 17:19:32,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 17:19:32,105 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-07-17 17:19:32,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:32,108 INFO L225 Difference]: With dead ends: 74 [2020-07-17 17:19:32,108 INFO L226 Difference]: Without dead ends: 68 [2020-07-17 17:19:32,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:19:32,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-17 17:19:32,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-07-17 17:19:32,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-17 17:19:32,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-07-17 17:19:32,129 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 34 [2020-07-17 17:19:32,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:32,129 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-07-17 17:19:32,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:19:32,130 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-07-17 17:19:32,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-17 17:19:32,133 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:32,133 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:32,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 17:19:32,134 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:32,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:32,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1875452576, now seen corresponding path program 1 times [2020-07-17 17:19:32,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:32,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691599494] [2020-07-17 17:19:32,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-17 17:19:32,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691599494] [2020-07-17 17:19:32,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:32,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-17 17:19:32,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958164012] [2020-07-17 17:19:32,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 17:19:32,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:32,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 17:19:32,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:19:32,267 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 6 states. [2020-07-17 17:19:32,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:32,369 INFO L93 Difference]: Finished difference Result 130 states and 178 transitions. [2020-07-17 17:19:32,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 17:19:32,370 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2020-07-17 17:19:32,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:32,372 INFO L225 Difference]: With dead ends: 130 [2020-07-17 17:19:32,372 INFO L226 Difference]: Without dead ends: 70 [2020-07-17 17:19:32,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:19:32,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-17 17:19:32,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-07-17 17:19:32,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-17 17:19:32,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2020-07-17 17:19:32,391 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 50 [2020-07-17 17:19:32,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:32,391 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2020-07-17 17:19:32,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 17:19:32,391 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2020-07-17 17:19:32,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-17 17:19:32,394 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:32,395 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:32,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 17:19:32,395 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:32,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:32,396 INFO L82 PathProgramCache]: Analyzing trace with hash 104828256, now seen corresponding path program 1 times [2020-07-17 17:19:32,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:32,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077695423] [2020-07-17 17:19:32,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:32,572 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-17 17:19:32,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077695423] [2020-07-17 17:19:32,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:32,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 17:19:32,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655484807] [2020-07-17 17:19:32,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 17:19:32,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:32,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 17:19:32,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:19:32,576 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand 8 states. [2020-07-17 17:19:32,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:32,688 INFO L93 Difference]: Finished difference Result 142 states and 197 transitions. [2020-07-17 17:19:32,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 17:19:32,691 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-07-17 17:19:32,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:32,693 INFO L225 Difference]: With dead ends: 142 [2020-07-17 17:19:32,694 INFO L226 Difference]: Without dead ends: 78 [2020-07-17 17:19:32,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:19:32,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-17 17:19:32,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-07-17 17:19:32,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-17 17:19:32,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2020-07-17 17:19:32,719 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 51 [2020-07-17 17:19:32,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:32,720 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2020-07-17 17:19:32,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 17:19:32,720 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2020-07-17 17:19:32,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-17 17:19:32,727 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:32,727 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:32,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 17:19:32,728 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:32,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:32,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1703786405, now seen corresponding path program 1 times [2020-07-17 17:19:32,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:32,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511428302] [2020-07-17 17:19:32,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-17 17:19:32,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511428302] [2020-07-17 17:19:32,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:32,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 17:19:32,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258103890] [2020-07-17 17:19:32,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 17:19:32,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:32,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 17:19:32,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:19:32,899 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand 8 states. [2020-07-17 17:19:33,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:33,115 INFO L93 Difference]: Finished difference Result 118 states and 158 transitions. [2020-07-17 17:19:33,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 17:19:33,115 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-07-17 17:19:33,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:33,120 INFO L225 Difference]: With dead ends: 118 [2020-07-17 17:19:33,121 INFO L226 Difference]: Without dead ends: 112 [2020-07-17 17:19:33,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-17 17:19:33,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-17 17:19:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2020-07-17 17:19:33,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-17 17:19:33,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 145 transitions. [2020-07-17 17:19:33,177 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 145 transitions. Word has length 52 [2020-07-17 17:19:33,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:33,178 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 145 transitions. [2020-07-17 17:19:33,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 17:19:33,178 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 145 transitions. [2020-07-17 17:19:33,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-17 17:19:33,182 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:33,182 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:33,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 17:19:33,183 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:33,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:33,184 INFO L82 PathProgramCache]: Analyzing trace with hash -521446491, now seen corresponding path program 1 times [2020-07-17 17:19:33,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:33,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538265626] [2020-07-17 17:19:33,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:33,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-17 17:19:33,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538265626] [2020-07-17 17:19:33,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:33,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 17:19:33,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905088350] [2020-07-17 17:19:33,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 17:19:33,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:33,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 17:19:33,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:19:33,394 INFO L87 Difference]: Start difference. First operand 106 states and 145 transitions. Second operand 8 states. [2020-07-17 17:19:33,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:33,529 INFO L93 Difference]: Finished difference Result 227 states and 348 transitions. [2020-07-17 17:19:33,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 17:19:33,530 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-07-17 17:19:33,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:33,532 INFO L225 Difference]: With dead ends: 227 [2020-07-17 17:19:33,533 INFO L226 Difference]: Without dead ends: 127 [2020-07-17 17:19:33,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:19:33,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-17 17:19:33,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2020-07-17 17:19:33,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-07-17 17:19:33,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 161 transitions. [2020-07-17 17:19:33,555 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 161 transitions. Word has length 69 [2020-07-17 17:19:33,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:33,556 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 161 transitions. [2020-07-17 17:19:33,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 17:19:33,556 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 161 transitions. [2020-07-17 17:19:33,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-07-17 17:19:33,558 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:33,558 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:33,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 17:19:33,559 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:33,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:33,559 INFO L82 PathProgramCache]: Analyzing trace with hash -439633211, now seen corresponding path program 1 times [2020-07-17 17:19:33,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:33,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799083596] [2020-07-17 17:19:33,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:33,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:33,707 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-17 17:19:33,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799083596] [2020-07-17 17:19:33,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:33,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-17 17:19:33,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727071664] [2020-07-17 17:19:33,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 17:19:33,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:33,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 17:19:33,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:19:33,710 INFO L87 Difference]: Start difference. First operand 115 states and 161 transitions. Second operand 10 states. [2020-07-17 17:19:33,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:33,955 INFO L93 Difference]: Finished difference Result 257 states and 400 transitions. [2020-07-17 17:19:33,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 17:19:33,956 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-07-17 17:19:33,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:33,960 INFO L225 Difference]: With dead ends: 257 [2020-07-17 17:19:33,961 INFO L226 Difference]: Without dead ends: 151 [2020-07-17 17:19:33,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-17 17:19:33,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-07-17 17:19:34,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 133. [2020-07-17 17:19:34,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-07-17 17:19:34,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 191 transitions. [2020-07-17 17:19:34,008 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 191 transitions. Word has length 70 [2020-07-17 17:19:34,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:34,009 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 191 transitions. [2020-07-17 17:19:34,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 17:19:34,010 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 191 transitions. [2020-07-17 17:19:34,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-07-17 17:19:34,014 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:34,014 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:34,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 17:19:34,015 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:34,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:34,015 INFO L82 PathProgramCache]: Analyzing trace with hash 307755032, now seen corresponding path program 2 times [2020-07-17 17:19:34,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:34,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915023178] [2020-07-17 17:19:34,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 59 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-17 17:19:34,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915023178] [2020-07-17 17:19:34,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:34,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-17 17:19:34,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176772363] [2020-07-17 17:19:34,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 17:19:34,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:34,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 17:19:34,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:19:34,323 INFO L87 Difference]: Start difference. First operand 133 states and 191 transitions. Second operand 12 states. [2020-07-17 17:19:34,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:34,759 INFO L93 Difference]: Finished difference Result 265 states and 420 transitions. [2020-07-17 17:19:34,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-17 17:19:34,760 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 105 [2020-07-17 17:19:34,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:34,763 INFO L225 Difference]: With dead ends: 265 [2020-07-17 17:19:34,763 INFO L226 Difference]: Without dead ends: 116 [2020-07-17 17:19:34,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-17 17:19:34,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-17 17:19:34,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2020-07-17 17:19:34,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-17 17:19:34,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2020-07-17 17:19:34,781 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 105 [2020-07-17 17:19:34,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:34,781 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2020-07-17 17:19:34,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 17:19:34,781 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2020-07-17 17:19:34,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-17 17:19:34,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:34,783 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:34,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 17:19:34,783 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:34,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:34,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1534580400, now seen corresponding path program 1 times [2020-07-17 17:19:34,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:34,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082311590] [2020-07-17 17:19:34,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:34,988 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 50 proven. 67 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-07-17 17:19:34,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082311590] [2020-07-17 17:19:34,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:34,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-17 17:19:34,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772919343] [2020-07-17 17:19:34,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 17:19:34,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:34,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 17:19:34,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:19:34,991 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand 10 states. [2020-07-17 17:19:35,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:35,201 INFO L93 Difference]: Finished difference Result 193 states and 255 transitions. [2020-07-17 17:19:35,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 17:19:35,202 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 123 [2020-07-17 17:19:35,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:35,204 INFO L225 Difference]: With dead ends: 193 [2020-07-17 17:19:35,204 INFO L226 Difference]: Without dead ends: 105 [2020-07-17 17:19:35,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-17 17:19:35,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-17 17:19:35,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-07-17 17:19:35,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-17 17:19:35,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2020-07-17 17:19:35,221 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 123 [2020-07-17 17:19:35,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:35,223 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2020-07-17 17:19:35,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 17:19:35,223 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2020-07-17 17:19:35,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-07-17 17:19:35,225 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:35,226 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:35,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 17:19:35,226 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:35,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:35,227 INFO L82 PathProgramCache]: Analyzing trace with hash 822116120, now seen corresponding path program 2 times [2020-07-17 17:19:35,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:35,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867429030] [2020-07-17 17:19:35,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:35,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:19:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 72 proven. 111 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-07-17 17:19:35,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867429030] [2020-07-17 17:19:35,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:19:35,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-17 17:19:35,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113171723] [2020-07-17 17:19:35,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 17:19:35,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:19:35,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 17:19:35,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:19:35,560 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand 12 states. [2020-07-17 17:19:36,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:19:36,014 INFO L93 Difference]: Finished difference Result 241 states and 326 transitions. [2020-07-17 17:19:36,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-17 17:19:36,015 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 140 [2020-07-17 17:19:36,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:19:36,018 INFO L225 Difference]: With dead ends: 241 [2020-07-17 17:19:36,018 INFO L226 Difference]: Without dead ends: 141 [2020-07-17 17:19:36,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-17 17:19:36,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-07-17 17:19:36,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 123. [2020-07-17 17:19:36,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-07-17 17:19:36,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 149 transitions. [2020-07-17 17:19:36,044 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 149 transitions. Word has length 140 [2020-07-17 17:19:36,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:19:36,045 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 149 transitions. [2020-07-17 17:19:36,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 17:19:36,045 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 149 transitions. [2020-07-17 17:19:36,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-07-17 17:19:36,049 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:19:36,050 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:19:36,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 17:19:36,050 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:19:36,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:19:36,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1260071360, now seen corresponding path program 2 times [2020-07-17 17:19:36,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:19:36,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604275747] [2020-07-17 17:19:36,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:19:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:19:36,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:19:36,168 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 17:19:36,168 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 17:19:36,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 17:19:36,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 05:19:36 BoogieIcfgContainer [2020-07-17 17:19:36,260 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 17:19:36,268 INFO L168 Benchmark]: Toolchain (without parser) took 6344.41 ms. Allocated memory was 143.7 MB in the beginning and 293.6 MB in the end (delta: 149.9 MB). Free memory was 101.8 MB in the beginning and 95.1 MB in the end (delta: 6.7 MB). Peak memory consumption was 156.6 MB. Max. memory is 7.1 GB. [2020-07-17 17:19:36,269 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 143.7 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-17 17:19:36,276 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.02 ms. Allocated memory is still 143.7 MB. Free memory was 101.3 MB in the beginning and 91.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-17 17:19:36,276 INFO L168 Benchmark]: Boogie Preprocessor took 31.17 ms. Allocated memory is still 143.7 MB. Free memory was 91.7 MB in the beginning and 90.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-17 17:19:36,277 INFO L168 Benchmark]: RCFGBuilder took 398.81 ms. Allocated memory was 143.7 MB in the beginning and 200.8 MB in the end (delta: 57.1 MB). Free memory was 90.4 MB in the beginning and 165.7 MB in the end (delta: -75.3 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-17 17:19:36,281 INFO L168 Benchmark]: TraceAbstraction took 5653.83 ms. Allocated memory was 200.8 MB in the beginning and 293.6 MB in the end (delta: 92.8 MB). Free memory was 165.7 MB in the beginning and 95.1 MB in the end (delta: 70.6 MB). Peak memory consumption was 163.4 MB. Max. memory is 7.1 GB. [2020-07-17 17:19:36,286 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 143.7 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.02 ms. Allocated memory is still 143.7 MB. Free memory was 101.3 MB in the beginning and 91.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.17 ms. Allocated memory is still 143.7 MB. Free memory was 91.7 MB in the beginning and 90.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 398.81 ms. Allocated memory was 143.7 MB in the beginning and 200.8 MB in the end (delta: 57.1 MB). Free memory was 90.4 MB in the beginning and 165.7 MB in the end (delta: -75.3 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5653.83 ms. Allocated memory was 200.8 MB in the beginning and 293.6 MB in the end (delta: 92.8 MB). Free memory was 165.7 MB in the beginning and 95.1 MB in the end (delta: 70.6 MB). Peak memory consumption was 163.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 5; VAL [x=5] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=2, \result=1, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=3, \result=2, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=2, \result=1, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=4, \result=3, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 VAL [\old(n)=0, n=0] [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=2, \result=1, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 VAL [\old(n)=1, n=1] [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); VAL [\old(n)=3, \result=2, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); VAL [\old(n)=5, \result=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=5, x=5] [L37] int result = fibo1(x); VAL [fibo1(x)=5, result=5, x=5] [L38] COND TRUE result == 5 VAL [result=5, x=5] [L39] __VERIFIER_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.4s, OverallIterations: 13, TraceHistogramMax: 9, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 527 SDtfs, 548 SDslu, 2199 SDs, 0 SdLazy, 1516 SolverSat, 177 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 327 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=133occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 87 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 900 NumberOfCodeBlocks, 900 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 748 ConstructedInterpolants, 0 QuantifiedInterpolants, 113046 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 548/825 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...